EP0982971A3 - Apparatus and method for matching the response of microphones in magnitude and phase - Google Patents

Apparatus and method for matching the response of microphones in magnitude and phase Download PDF

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Publication number
EP0982971A3
EP0982971A3 EP99306623A EP99306623A EP0982971A3 EP 0982971 A3 EP0982971 A3 EP 0982971A3 EP 99306623 A EP99306623 A EP 99306623A EP 99306623 A EP99306623 A EP 99306623A EP 0982971 A3 EP0982971 A3 EP 0982971A3
Authority
EP
European Patent Office
Prior art keywords
output
matching
microphones
microphone
response
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99306623A
Other languages
German (de)
French (fr)
Other versions
EP0982971B1 (en
EP0982971A2 (en
Inventor
Stephen C. Thompson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knowles Electronics LLC
Original Assignee
Knowles Electronics LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knowles Electronics LLC filed Critical Knowles Electronics LLC
Publication of EP0982971A2 publication Critical patent/EP0982971A2/en
Publication of EP0982971A3 publication Critical patent/EP0982971A3/en
Application granted granted Critical
Publication of EP0982971B1 publication Critical patent/EP0982971B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/40—Arrangements for obtaining a desired directivity characteristic
    • H04R25/407—Circuits for combining signals of a plurality of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements
    • H04R29/004—Monitoring arrangements; Testing arrangements for microphones
    • H04R29/005—Microphone arrays
    • H04R29/006—Microphone matching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Neurosurgery (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

An apparatus is provided for matching the response of a pair of microphones. The two microphones provide a first and second output, respectively, in response to an audible input. The microphone outputs are subtract from each other to produce a gain control output for operably controlling the gain of the first microphone output, resulting in a gain compensated microphone output. A phase adjustment circuit also is provided responsive to the gain compensated microphone output and a rolloff control output for producing a matching output. The rolloff control output is generated by a phase difference subtractor circuit responsive to both the matching output and the second microphone output. Moreover, the output of at least one of the microphones has a resonance frequency that is shifted to a desired preselected frequency.
EP99306623A 1998-08-25 1999-08-20 Apparatus and method for matching the response of microphones in magnitude and phase Expired - Lifetime EP0982971B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US9792698P 1998-08-25 1998-08-25
US97926P 1998-08-25
US09/193,012 US6654468B1 (en) 1998-08-25 1998-11-16 Apparatus and method for matching the response of microphones in magnitude and phase
US193012 1998-11-16

Publications (3)

Publication Number Publication Date
EP0982971A2 EP0982971A2 (en) 2000-03-01
EP0982971A3 true EP0982971A3 (en) 2001-04-18
EP0982971B1 EP0982971B1 (en) 2006-10-18

Family

ID=26793792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99306623A Expired - Lifetime EP0982971B1 (en) 1998-08-25 1999-08-20 Apparatus and method for matching the response of microphones in magnitude and phase

Country Status (4)

Country Link
US (2) US6654468B1 (en)
EP (1) EP0982971B1 (en)
DE (1) DE69933627T2 (en)
DK (1) DK0982971T3 (en)

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US8682005B2 (en) 1999-11-19 2014-03-25 Gentex Corporation Vehicle accessory microphone
US7447320B2 (en) * 2001-02-14 2008-11-04 Gentex Corporation Vehicle accessory microphone
US20010028718A1 (en) 2000-02-17 2001-10-11 Audia Technology, Inc. Null adaptation in multi-microphone directional system
US7155019B2 (en) * 2000-03-14 2006-12-26 Apherma Corporation Adaptive microphone matching in multi-microphone directional system
US7116792B1 (en) * 2000-07-05 2006-10-03 Gn Resound North America Corporation Directional microphone system
US7471798B2 (en) * 2000-09-29 2008-12-30 Knowles Electronics, Llc Microphone array having a second order directional pattern
US7065220B2 (en) 2000-09-29 2006-06-20 Knowles Electronics, Inc. Microphone array having a second order directional pattern
US6741714B2 (en) 2000-10-04 2004-05-25 Widex A/S Hearing aid with adaptive matching of input transducers
JP4250421B2 (en) * 2001-02-14 2009-04-08 ジェンテクス・コーポレーション Vehicle accessory microphone
CA2396832C (en) * 2001-05-23 2008-12-16 Phonak Ag Method of generating an electrical output signal and acoustical/electrical conversion system
EP1351544A3 (en) * 2002-03-08 2008-03-19 Gennum Corporation Low-noise directional microphone system
DE10310579B4 (en) * 2003-03-11 2005-06-16 Siemens Audiologische Technik Gmbh Automatic microphone adjustment for a directional microphone system with at least three microphones
DE10310580A1 (en) 2003-03-11 2004-10-07 Siemens Audiologische Technik Gmbh Device and method for adapting hearing aid microphones
EP1629687A1 (en) 2003-05-15 2006-03-01 Oticon A/S Microphone with adjustable properties
DE10327890A1 (en) 2003-06-20 2005-01-20 Siemens Audiologische Technik Gmbh Method for operating a hearing aid and hearing aid with a microphone system, in which different directional characteristics are adjustable
US7424119B2 (en) * 2003-08-29 2008-09-09 Audio-Technica, U.S., Inc. Voice matching system for audio transducers
DE102004010867B3 (en) * 2004-03-05 2005-08-18 Siemens Audiologische Technik Gmbh Matching phases of microphones of hearing aid directional microphone involves matching second signal level to first by varying transition time of output signal from microphone without taking into account sound source position information
US7688985B2 (en) * 2004-04-30 2010-03-30 Phonak Ag Automatic microphone matching
DK200401280A (en) * 2004-08-24 2006-02-25 Oticon As Low frequency phase matching for microphones
WO2006042540A1 (en) * 2004-10-19 2006-04-27 Widex A/S System and method for adaptive microphone matching in a hearing aid
EP1773098B1 (en) * 2005-10-06 2012-12-12 Oticon A/S A system and method for matching microphones
JP2009529699A (en) * 2006-03-01 2009-08-20 ソフトマックス，インコーポレイテッド System and method for generating separated signals
US20080152167A1 (en) * 2006-12-22 2008-06-26 Step Communications Corporation Near-field vector signal enhancement
US8160273B2 (en) * 2007-02-26 2012-04-17 Erik Visser Systems, methods, and apparatus for signal separation using data driven techniques
JP2010519602A (en) * 2007-02-26 2010-06-03 クゥアルコム・インコーポレイテッド System, method and apparatus for signal separation
JP2008278476A (en) * 2007-04-05 2008-11-13 Yamaha Corp S/n ratio improvement method for condenser microphone, condenser microphone, and condenser microphone mounted device
JP5130895B2 (en) * 2007-12-13 2013-01-30 ソニー株式会社 Audio processing apparatus, audio processing system, audio processing program, and audio processing method
US8175291B2 (en) * 2007-12-19 2012-05-08 Qualcomm Incorporated Systems, methods, and apparatus for multi-microphone based speech enhancement
US8275151B2 (en) * 2007-12-19 2012-09-25 Agere Systems Inc. Speakerphone using adaptive phase rotation
US8321214B2 (en) * 2008-06-02 2012-11-27 Qualcomm Incorporated Systems, methods, and apparatus for multichannel signal amplitude balancing
JP2012501609A (en) * 2008-08-29 2012-01-19 ザ・ペン・ステイト・リサーチ・ファウンデイション Method and apparatus for reducing distortion of a balanced armature device
US8724829B2 (en) * 2008-10-24 2014-05-13 Qualcomm Incorporated Systems, methods, apparatus, and computer-readable media for coherence detection
US8229126B2 (en) * 2009-03-13 2012-07-24 Harris Corporation Noise error amplitude reduction
US8620672B2 (en) * 2009-06-09 2013-12-31 Qualcomm Incorporated Systems, methods, apparatus, and computer-readable media for phase-based processing of multichannel signal
US8731210B2 (en) * 2009-09-21 2014-05-20 Mediatek Inc. Audio processing methods and apparatuses utilizing the same
WO2011044395A1 (en) * 2009-10-09 2011-04-14 National Acquisition Sub, Inc. An input signal mismatch compensation system
US9648421B2 (en) 2011-12-14 2017-05-09 Harris Corporation Systems and methods for matching gain levels of transducers
FR3018418B1 (en) * 2014-03-04 2017-11-10 Univ Maine DEVICE AND METHOD FOR FILTERING THE RESONANCE PIC IN A POWER CIRCUIT OF AT LEAST ONE SPEAKER
FR3018419B1 (en) * 2014-03-05 2017-06-23 Univ Maine DEVICE AND METHOD FOR FILTERING THE RESONANCE PIC IN A POWER SUPPLY CIRCUIT OF AT LEAST ONE SPEAKER BEFORE THE SAME
WO2017011461A1 (en) 2015-07-15 2017-01-19 Knowles Electronics, Llc Hybrid transducer
US9843292B2 (en) 2015-10-14 2017-12-12 Knowles Electronics, Llc Method and apparatus for maintaining DC bias
WO2017083679A1 (en) 2015-11-12 2017-05-18 Knowles Electronics, Llc Method and apparatus to increase audio band microphone sensitivity
US10244333B2 (en) * 2016-06-06 2019-03-26 Starkey Laboratories, Inc. Method and apparatus for improving speech intelligibility in hearing devices using remote microphone
US10477308B2 (en) 2016-12-30 2019-11-12 Sonion Nederland B.V. Circuit and a receiver comprising the circuit
CN109218920B (en) * 2017-06-30 2020-09-18 华为技术有限公司 Signal processing method and device and terminal
JP2020036214A (en) 2018-08-30 2020-03-05 Tdk株式会社 MEMS microphone
JP2020036215A (en) 2018-08-30 2020-03-05 Tdk株式会社 MEMS microphone
US11062687B2 (en) * 2019-01-04 2021-07-13 Bose Corporation Compensation for microphone roll-off variation in acoustic devices
US11290809B2 (en) * 2019-07-14 2022-03-29 Peiker Acustic Gmbh Dynamic sensitivity matching of microphones in a microphone array
EP4005241B1 (en) * 2019-07-31 2024-08-21 Starkey Laboratories, Inc. Ear-worn electronic device incorporating microphone fault reduction system and method
CN213694096U (en) 2019-12-27 2021-07-13 楼氏电子(苏州)有限公司 Hearing device
DE102020200553B3 (en) * 2020-01-17 2021-05-12 Sivantos Pte. Ltd. Method for matching the respective phase responses of a first microphone and a second microphone

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US4420655A (en) * 1980-07-02 1983-12-13 Nippon Gakki Seizo Kabushiki Kaisha Circuit to compensate for deficit of output characteristics of a microphone by output characteristics of associated other microphones
JPS5964994A (en) * 1982-10-05 1984-04-13 Matsushita Electric Ind Co Ltd Microphone device
US4509022A (en) * 1982-03-01 1985-04-02 U.S. Philips Corporation Amplifier circuit with automatic gain control and hearing aid equipped with such a circuit
US4622440A (en) * 1984-04-11 1986-11-11 In Tech Systems Corp. Differential hearing aid with programmable frequency response
EP0509742A2 (en) * 1991-04-18 1992-10-21 Matsushita Electric Industrial Co., Ltd. Microphone apparatus

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US6654468B1 (en) * 1998-08-25 2003-11-25 Knowles Electronics, Llc Apparatus and method for matching the response of microphones in magnitude and phase
DE19918883C1 (en) * 1999-04-26 2000-11-30 Siemens Audiologische Technik Obtaining directional microphone characteristic for hearing aid

Patent Citations (5)

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US4420655A (en) * 1980-07-02 1983-12-13 Nippon Gakki Seizo Kabushiki Kaisha Circuit to compensate for deficit of output characteristics of a microphone by output characteristics of associated other microphones
US4509022A (en) * 1982-03-01 1985-04-02 U.S. Philips Corporation Amplifier circuit with automatic gain control and hearing aid equipped with such a circuit
JPS5964994A (en) * 1982-10-05 1984-04-13 Matsushita Electric Ind Co Ltd Microphone device
US4622440A (en) * 1984-04-11 1986-11-11 In Tech Systems Corp. Differential hearing aid with programmable frequency response
EP0509742A2 (en) * 1991-04-18 1992-10-21 Matsushita Electric Industrial Co., Ltd. Microphone apparatus

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
DE69933627T2 (en) 2007-08-23
EP0982971B1 (en) 2006-10-18
DK0982971T3 (en) 2007-01-08
US6654468B1 (en) 2003-11-25
EP0982971A2 (en) 2000-03-01
DE69933627D1 (en) 2006-11-30
US20030198356A1 (en) 2003-10-23
US7113604B2 (en) 2006-09-26

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